When I first had a hand held gps device, in 1994 or thereabouts. This used to be a game. i.e. someone puts a waypoint in and you navigate to it (driving) knowing only its distance and direction, using the big arrow and having no knowledge of final destination other than that contained within the gps device. The reason it was a good game is that road layouts, at least those in the UK, don't cooperate fully. You have to 'read' the land and assess the likelihood of a given road swinging in the right direction, how soon it might do that, consider whether it's a viable through route, etc. In other words, it's not exactly easy to interpret a direct route, but it's good fun. To be fair, it works very well where there are lots of roads and junctions; in the middle of large cities or metropolitan areas for example. Rather less efficient in rural areas, and the further north in the UK you go, broadly speaking, the more 'fun' it becomes.